2 wire feeder to 2 space 240v breaker disconnect feeding 3 wire GFCI 240 outlet

T

tyson7

Member
Location
Minneapolis
Occupation
Electrician
Is there anywhere in the code book that would prevent me from using an existing 6-2MC, installing a 60 amp 240v GFCI breaker disconnect where it terminates, bonding the nuetral bus to the enclosure, and feeding a 4 wire GFCI protected EV outlet from it? And if so, what would the code reference be?
 
Yes: using an EGC as a neutral is prohibited; if it's the neutral, where's the EGC?

I'm sure it's in art. 250 somewhere.
 
Unfortunately, some EVSEs come with cords with NEMA 14 plugs. So if by "4 wire GFCI protected EV outlet" the OP meant a NEMA 14 receptacle, it seems improper to leave such a receptacle unsupplied with a neutral, even if you know the EVSE doesn't use the neutral prong on the plug.

In which case the OP needs to change the 6-2 to 6-3, hardwire the EVSE, or switch to a NEMA 6 plug and receptacle. But if the EVSE comes with a cord and plug with a temperature sensor in the plug (a safety features some of them implement), changing the plug is probably only possible if the EVSE manufacturer sells a replacement NEMA 6 cord and plug.

Cheers, Wayne
 
LarryFine said:
The OP mentioned MC.
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Would need to be MC-AP to be able to use the sheath as an EGC.

But 6-2 MC-AP if it exists would likely be just a black and white conductor and the sheath as the EGC. If it is HCF cable it would also have a green. Might not be much ?readily availability? of that in 6 AWG size though
 
wwhitney said:
Unfortunately, some EVSEs come with cords with NEMA 14 plugs. So if by "4 wire GFCI protected EV outlet" the OP meant a NEMA 14 receptacle, it seems improper to leave such a receptacle unsupplied with a neutral, even if you know the EVSE doesn't use the neutral prong on the plug.

In which case the OP needs to change the 6-2 to 6-3, hardwire the EVSE, or switch to a NEMA 6 plug and receptacle. But if the EVSE comes with a cord and plug with a temperature sensor in the plug (a safety features some of them implement), changing the plug is probably only possible if the EVSE manufacturer sells a replacement NEMA 6 cord and plug.

Cheers, Wayne
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I think the dealers are telling customers they need the Nema 14, so they can take the charger with them to use in campgrounds or plug into somebodies range when they travel. Most do not take theirs with them, so it’s a waste of money.
 
hillbilly1 said:
I think the dealers are telling customers they need the Nema 14, so they can take the charger with them to use in campgrounds or plug into somebodies range when they travel. Most do not take theirs with them, so it’s a waste of money.
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Not necessary anyway, Amazon, Temu, etc. will sell you whatever adapter you would need in those situations :unsure:
 
hillbilly1 said:
I think the dealers are telling customers they need the Nema 14, so they can take the charger with them to use in campgrounds or plug into somebodies range when they travel. Most do not take theirs with them, so it’s a waste of money.
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Most dealers know very little about EVs and don’t want to sell them. They know even less about EVSEs.

Most plug-in 30-40A EVSEs are designed with a 14-50 as standard. The common rationale is the prevalence of such receptacles at RV parks. It might make sense for portable units, but not for wall-mounted.
 
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